Demountable rim



E. E. JAMESON AND T. VKAMEHON, DEMOUNTABLEVRIM., A'PPucAloN manen/m. 31,1919. :1,367,395, Patented Feb. 1,1921.-

y certain new and usefulk Improvements in EDGAR E. JAMESON ANI) TOM` KAMERON, OL SCHLATER, MISSSSIPPI, ASSIGNORS 0F ONEJrninn rro ED. Jonas, or SGHLATER, MISSISSIPPI.

DEMOUNTABLE RIM.

specification of Letters Patent.

Patented Feb. 1, 1921.

Application filed March 31, 1919. Serial Ne.` 286,280.

To all whomit lmay concern Be it known that we, EDGAR E. JAMESON and TOM Kenianen, citizens of the United States, residing at Schlater, in the county of lieflore, State ot Mississippi, have invented Demountable Rims: and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has reference to improvements in demountable rims and more partie nlarly to improved fastening means for securing the rim on the telly` of the wheel, the object ot' the invention being to permita rim with a tire engaged thereon to be instantaneously removed without the aid of any tool whatsoever, replacement of a rim with a new tire being accomplished with equal facility, while the construction is also such that the rim will not squeak or become loose as is general with demonntable rims.

The invention further consists in the provision of a wheel having a tapered `telly equipped with a l.flange at one side and having means for engagement by a demountable rim so as to secure the latter to the wheel ielly in a novel and etficient manner insuring its retention under shocks, strains and vibrations, while the greater the driving strain the more rigid will the rim be held on the wheel, the locking means between the demountable rim and the :telly being such that through the medium of a ratchet lock- 'ing device, the rim will be prevented from backing ofl when the direction of the car is reversed, said locking device being capable of convenient manipulation to release it whereby a tire can be removed for repair or replacement in an instant, thus lending the device special advantage in connection with automobile races, or whereverthe facility of quick removal and renewal of a tire is desirable. i

Vith the above objects and others in view as will appear as the specification proceeds, the invention comprises certainnovel combinations and arrangements of parts as will Aperipheral surface `15` be hereinafter more particularly pointed out and claimed.

`Reference isphad to the accompanying drawings Ytorming a part of this application, wherein like characters designate corresponding parts throughout the several views, in which- Figure 1` is a side elevation of a wheel having a demountable rim in accordance with the invention;

F ig. 2 is a plan view of the wheel with the rim removed;

Fig. 3 is a longitudinal section with the demountable tire carrying rim in position;

Fig. -4 is a cross sectional view taken through the felly and rim;

Fig. 5 is a sectional view taken through the automatic locking device in a locked position, and

Fig. .o is a sectional automatic ratchet locking `device released. Referringto the drawings in detail, there is shown a demountable wheel `having the usual` hub 10, spokes 11 and a telly 12. rThis iellyis mounted upon the spokes and is provided at one side with a flange 14:, the

toward the opposite side so as to `telly of tapered cross section. i

Upon its peripheral surface the telly 12 is equipped with a plurality of diagonally extending grooves 16 extending to and closed hy the flange 111 and opening at the opposite side or edge ot the felly. `Four of these grooves are preferably employed, all ex tending in the same direction with the closed ends of the groovesdisposed in a direction opposite to that in which the wheel rotates, while the entrance or open mouths of the grooves extend in the same direction. Cooperating withthe wheel and its telly, is a deinountable rim 17, the latter being of anypreferred type so as to retain the tire thereon,` but being shown of the clencher type having lined retaining flanges 18. lroj ecting inwardly at equidistantly spaced points trom the demountable rim atlits inner face are a `plurality of lugs 19, preferably `four or more corresponding to the number produce a.

detail showing the of the felly sloping i inner ends of the grooves.

of grooves in the felly and designed to engage said grooves in the lateral and circumferential movement of the rim relative to the felly in applying and removing the rim with or without a tire thereon.

The felly is further provided intermediately of two spokes, with a slot 2O designed to receive the inflation valve 2l of the air tube within the tire 22 engaged on the demountable rim and projecting through an opening in the latter. The purpose of this slot is to permit longitudinal or rotative movement of the valve l to the felly. In applying this rim, its lugs are engaged in the grooves through the wide entrancel portions thereof, and the whole rim then given a lateral and rotativeor'circumferential movement with respect to the fellyl so thatthe demountable rim will be moved laterally intok abutment with the flange 14 while the lugs are moved obliquely to the To permit this the inner edge of the demountable rim corresponding to the side which lits the flange 4,'is-chamfered so as to conform with the v.said flange, and the inner face of the rim is beveled or tapered as at 23 so as to conform i l ratchet faced e'Xpansible springs 28'inclose to thesurface `l5 of the felly, by reason of its 4opposite bevel or taper. Y

In order to lock the 'demountable rim in position when so engaged with the felly, a ratchetflocking device is provided, the' vsame consisting. of a plurality, preferably two plates 24 having? shank portions 25, the plates being of a curvature to conform to the curvature of the felly and disposed vwithin recesses or seats 26 in the felly while the shank portions 25 are engaged through radial openings 27 communieating with the Vrecesses or seats 26. Coiled l the shank por- Y. vtions within the seats and between the inner hand, rotation of the Walls of said seats and the ratchet plates so as to normally force the latter outwardly and their teeth into corresponding ratchet teeth 29 suitably formed in the inner surface ofthe demountable rim. It should be noted that these ratchet teeth and plates are spaced from the sides or` edges of the rim and 'felly and disposed between pairs of spokes, preferably at diametrically opposite sides of the wheel, the teeth of the plates being so disposed that the rim will be prevented from backing olf orbecoming displaced relative tothe felly when the direction of the car is reversed.' On the other wheel while the car moves forward tends to press the lugs 19 closely into the inner closed ends of the grooves 16, and therefore when the driving strain is'inereased, the rim will be more tightly secured in position on the felly. In

order to disengage the spring actuated movplatesvcarried bythe felly, from ableratchet engagement with the J ED late 32 is engaged on the shank and a cam lever 3l is provided with a bifurcation producing jaws 38 having alined apertures cngaged by the pivot pin 30. lVhen the levers are in alinement with the spokes the cams 34A are so disposed that the springs will be allowed to project the ratchet plates carried by the folly, but when it is desired to disengage the latter, the lever of each device is swung downwardly and outwardly, thereby compressing the interfitting springs on the shank portions of the ratchet plates carried by the felly so as to retract said plates from rim plates, thereby permitting the demountable rim to be removed from the felly. v operation can be very quickly carried out without the aid of any tool and all noise and possibility of the device working loose will be prevented, since use of bolts and nuts as 1s common in demountable rim constructions, is obviated.

` What is claimed is:

l. The combination with a whose surface is transversely surface having a plurality posed grooves whose inner ends are closed and whose other ends are open at the low side of the felly, the latter having a slot for the passage of the valve nipple and its movement eircumfercntially of the folly; of a rim whose inner face is beveled to corre` spond with the surface of said felly, a series of lugs projecting from said inner face at points to coact with said grooves, the inner face of the rim having ratchet teeth at intervals, plates disposed at corresponding intervals in the felly and having ratchet teeth on their outer faces, springs bearing` said plates normally outward, and manually operable means for drawing them inward. In a wheel having a felly of tapered cross section and having a flange upon the side, the peripheral face of the felly having a plurality of equidistantlyv spaced diagonal grooves communicating with the side opposite the flange, the demountable rim having a tapered cross section conforming to the felly interiorly and beveled to lit the flange, said felly-having a slot therethrough to re` ceive an inliating valve of a tire adapted to be arranged upon the rim and the rim having a plurality of lugs equidistantly spaced in the same relation as the grooves of the felly and extending inwardly from the rim and intermediately of its side edges for engagement with the grooves` ratchet teeth heing formed on the inner face of the rim, a ratchet plate mounted in the outer face of wheel felly tapered, said of obliquely dis- Furthermore` this llO the felly and having a shank portion extending through the felly, spring means no1'- Inally projecting the said ratchet plate to engage the said ratchet teeth and a cam f' lever on the shank portion of the said ratchet plate and on the inside of the felly to retract the said ratchet plate and hold the same in retracted position out of engagement with the said ratchet teeth to permit application and removal of the demountable rim, as 10 and for the purposes specified.

In testimony whereof We aix our signatures in the presence of two Witnesses.

EDGAR E. JAMESON. TOM KAMERON. Witnesses:

B. K. GLENN, W. V. BAILEY. 

